HSM12 Winterbottom to Warburton

The route section between Winterbottom and Warburton would be 8.5km long. The section of route connecting to Winterbottom from the south would be HSM10 from Hough.

The design speed for the section between Winterbottom and Warburton is 400kph (248mph) reducing to 360kph (223mph) just south of the M56. This reduction is driven by the design required for the route to pass between Mossbrow and Warburton.

The route would be on an embankment for 1.7km with a maximum height of 8m. The route would pass through the route of overhead power lines. Hoogreen Lane would be realigned onto a bridge over the route. The route would then pass into a cutting for 1.3km with a maximum depth of 8m. The A50 would be realigned onto a bridge over the route.

A short section of low embankment (up to 2m high) would be followed by a cutting with a maximum depth of 17m. Peacock Lane would be realigned onto a bridge over the route. Agden Lane would cross over the route on a bridge. The route would pass under the M56 and then move onto an embankment (maximum height of 7m) for 2.8km crossing over the A56. Agden Lane would be closed at the crossing and Warrington Lane diverted for 800m on the west side of the route to avoid it. There may be requirements for temporary diversions and traffic management on the M56 during construction.

For the next 2km the route would be over an area of mudstone with soluble deposits (risk of subsidence from dissolution).

The route would cross over the Bridgewater Canal at a height of 5m. The route would cross over Spring Lane (which would be realigned) and Wet Gate Lane would be diverted for 900m on the west side of the route to avoid four crossings. The route would then cross over the River Bollin flood plain on a 345m long viaduct at a height of 4m before passing into a cutting with a maximum depth of 9m.

At Warburton the route would continue along section HSM21 to Lowton.

Information taken from HS2 Phase two engineering options report West Midlands to Manchester part 1

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